论文部分内容阅读
研究了锰67.61～73.58％,碳0.51～0.96％范围内的锰—铝—碳永磁合金的磁性、显微组织和亚稳态铁磁性τ相的稳定性。从高温平衡态ε相控速冷却或淬火随后回火均能获得τ相,但控速冷却样品的磁性能低。由于碳的作用,使ε相转变减缓,ε相区下移,临界温度降低80℃～100℃。τ相的稳定性随锰、碳含量而变化,在合适的含C量范围内,随Mn含量增加,τ相稳定性降低;淬火样品在不同温度加热60分钟,组成为71.76％Mn0.96％C的样品700℃τ相开始分解;组成为72.48％Mn0.7％C的样品600℃τ相开始分解。
The magnetic, microstructure and metastable ferromagnetic τ phase stability of manganese-aluminum-carbon permanent magnetic alloys in the range of 67.61-73.58% of manganese and 0.51-0.96% of carbon were studied. The τ-phase can be obtained from controlled temperature-controlled phase ε cooling or quenching followed by tempering, but the magnetic properties of controlled-cooling samples are low. Due to the action of carbon, the transformation of ε phase slows down and the ε phase region moves down, lowering the critical temperature by 80 ℃ ~ 100 ℃. The stability of τ phase changes with the content of manganese and carbon, and the stability of τ phase decreases with the increase of Mn content in the range of suitable C content. The quenched sample is heated at different temperatures for 60 minutes to form 71.76% Mn0.96% Samples of C begin to decompose at 700 ° C, and samples with composition of 72.48% Mn 0.7% C begin to decompose at 600 ° C.